Is Giuliani correct? Is Romney truly a man "without a core"? The simple answer: No. Romney has a distinct core -- not that of a politician, but of a CEO.

What do I mean? We have become accustomed in these highly partisan times to politicians who adhere rigidly to their ideological positions. They don't change their views to attract supporters. Rather, they want voters to agree with the positions they advocate.

In contrast, a CEO is not shackled by ideology. A CEO's success is measured by the bottom line, not by how many principles he or she sticks to.

To the CEO, if a product is not selling, you don't stick with it until the product destroys your business. Instead, you tweak it. You rebrand it. You try a new slogan or new packaging. And if people are still not buying it, like New Coke, you drop it. You regroup, come up with a new product and then start selling again.